Automatic alarm-lock.



M. SHEI'NMAN.

AUTOMATIC ALARM LOCK.

APPLIOATION FILED MAY 15, 1913.

1,097,884, Patented May 26, 1914.

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M. SHEINMAN.

AUTOMATIC ALARM LOCK.

APPLIGATION FILED MAY 15, 1913.

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Patented May 276, 1914.

MORRIS SHEINMAN, 0F NEW YORK, N. Y.

AUTOMATIC ALARM-LOCK.

Specification of Iietters Patent.

Patented May 26, 1914.

Application filed May 15, 1913. Serial No. 767,835.

To all whom t may concern Be it known that I, MORRIS SHEINMAN, a

citizen of the United States, and a resident of New York, county and State of New York, have invented certain new and useful Improvements in Automatic Alarm-Locks, of which the following is a full, clear, exact description. j

This invention relates more particularly to an automatic alarm lock such as disclosed in my Patent No. 994,542, patented June 6, 1911, in which an alarm is sounded in case the lock is tampered with.

One of the principal objects of the invention is to provide simple and eficient means mounted upon the bolt ofthe lock and movable therewith when the bolt is operated by the key in the usual way to lock and unlock the same, but which is independently movable of the bolt and adapted to automatically close a circuit and sound an alarm included in said circuit in case the lock is tampered with or the door forced away from the jamb by means of a chisel, tool or other device.

Another object of the invention is to provide means whereby a ready adjustment may be secured in order that the parts may be so positioned that a very slight movement of the bolt will automatically set the alarm except when operated by the proper key or means provided for moving the bolt to a locked or unlocked position.

A further object of the invention is to simplify the construction of locks of this kind as previously constructed, and to provide a lock which may be readily made and assembled.

With these and other objects in view, the invention will be hereinafter more particularly described with reference to the accompanying drawings, which form a part of this specification, and will then be pointed out in the claims at the end of the description.

In the drawings, Figure 1 is a rear elevation of the lock and keeper removed from the door. Fig. 2 is a view similar to Fig. 1, except that the back or cover member has been removed. Fig. 3 is a sectional plan view taken on the line III-III of Fig. 2, looking in the direction of the arrows. Fig. 4 is a detail view of the back or cover member detached from the lock and showing one of the contacts. Fig. 5 isa det-ail view, partly in section, of the bolt with a part of the and alarm mechanism. Fig. 6 is a detail perspective view of the tumbler. Fig. 7 is a transverse section through the bolt taken on thelme VII-VII of Fig. 5; and Fig. 8 is a diagrammatic view showing the lock on a small scale in position and an alarm in the form of a bell which is adapted to be sounded in case the lock is tampered with included in an electric circuit.

The casing 10 comprises a box-like main member 11 in which the lock mechanism is arranged and a back or cover member 12. The casing is substantially rectangular in form and may be secured to the door 13 by screws or otherwise, the said plate member 12 being secured to the casing member 10 also by screws or in any other desired way. A bolt 14 is slidably held in the casing and has an engaging part or head 16 which is adapted to move through an opening 17 in a keeper 18. The keep'er 13 may be secured to the door jamb 19 by screws or otherwise, and said keeper has a plate portion 20 which is adapted to extend across the inner face of the door jamb. The engaging part 16 is substantially block-like in form and has a substantially rectangular plate portion 21 located within the box-like casing member 11. This plate-like portion 21 has a slot or opening 22 lengthwise thereof and a short slot 23 arranged at an angle with respect to the slot or opening 22. On opposite sides of the slot 23 are lugs or projections 24 and 24a which are adapted to be engaged by the cutaway parts 25 and 25a respectively, of a tumbler 26. The tumbler 26 is pivotally held to the bolt so as to move therewith and has a pivot pin in one end thereof which enters an opening, as 27, Fig. 5, to permit an up-and-down movement. The tumbler is normally forced in one direction by a fiat spring 28 one end of which is held to one end' of the tumbler and the other end engages under a lug' or projection 29 of the bolt 14 so that said tumbler is normally forced to the position shown in Fig. 2. The tumbler has Va part 30 normally located between the lugs or projections 24 and 24a of the bolt and has a laterally extending portion 31 which enters the slot 23 of the bolt. A lug 32 extends from the casing member 11 outward through 'an opening 33 in the back plate or member12. The lug 32 when the bolt is in an unlocked position is engaged by a cut-away part 35 of the tumbler 26 and when in a locked position the said lug 32 is engaged by a cut-away or slotted part 34 of the tumbler in order that the bolt may be prevented from moving to an unlocked position unless said bolt is moved by a key or the special means provided therefor, as will be presently described. It will be evident that when the tumbler is moved on its pivot to remove the cut-away parts 25 and 25a from the lugs 24 and 24a, the cut-away part 35 will also be removed from the lug 32 and the bolt with its tumbler may be moved to a locked position, and when in this position the spring 28 will restore the tumbler to its former position so that the parts 25 and 25a will again engage the lugs 24 and 24a respectively, and the shoulder 3G of the cut-away part 34 will abut against the lug 32 preventing the bolt from moving backward until the tumbler has been again moved.

rlwo cylindrical members 37 and 38 are provided, the former on the door 13 and the latter on the casing 10, each being adapted for the reception of a key 40 in a manner similar to the ordinary Yale lock. The key operates a member 39 when the key is inserted as shown in Fig. 3, and operates a rotary member 41 when the key is inserted in the cylinder 37 forming a part of the door, the connection between the rotary portion of the cylinder 37 as well as the construction of the rotary member 41 being of the usual construction. The tumbler 26 is adapted to be moved by the engagement of the projec tion on either of the rotary members 39 or 41 so as to throw the bolt either to a locked or unlocked position. The parts thus far described are substantially the same as disclosed in my patenthereinbefore referred to and may be ot any suitable construction,

To automatically close a circuit and sound an alarm in case the lock is tampered with or in case an attempt is made to spread the door from the j amb without moving the bolt in the usual way, l provide a contact device or member 42. This device has an oval body portion 43 which is held to slide in a correspondingly formed opening` in the engaging part or head 16 of the bolt. rlhis device 42 is slotted, as at 44, and projecting through said slot is a` pin 45 held to and carried by the engaging part 16, and interposed between the pin 45 and the end of the slot 44 is a spring 4G. The tendency of the spring 4G is to force the device outward along the bolt so that the outer edge of the device 42 will be substantially flush with the out-er edge of the engaging part 16. A. contact finger or part 47 extends within the casing and is formed a part of the device 42. This )art 47 has a stem portion 48 and a finger or projecting part 49, the part 48 being cut away sufficiently to provide a free space between the inner edge of the body portion 43 i of the device 42 and the finger 49. A contact which may be in the form of a light spring wire is adapted to be normally located in the space between the linger 49 and the inner end of the body part 43 ot the device 42 over the stem portion 48 and out of contact therewith, This contact is shown in full lines in Figs. 3 and 4 and in dotted lines in its proper position in Fig. 1. The contact 50 is insulated from the backing or cover member 12' and is held at 51 and 52 to said cover member 12. The contact 50 is substantially L-shaped and is insulated by means of washers or otherwise from said member 12, although the said contact may be of any other suitable form than that shown.

The cover plate or member 12 with the box-like casing member 11 forms one terminal of an electric circuit 53 and the device 42 is therefore included in this circuit as it is slidingly held in the bolt 14 and in contact therewith, and the said bolt is in contact at one or more points with the casing. The contact 52 while insulated from the casing` is connected by a wire 54 of the electric circuit 53 and in this circuit is in cluded a bell 55 or other alarm and a battery 56. 1t will thus be evident that it the circuit is completed between the contact iinger 49 of the device 42 and the contact 50, the circuit will be closed and the bell will ring but the circuit will remain normally open until such contact is effected.

The bolt 14 and the device 42 normally move bodily together so that the bolt may be moved to a locked or an unlocked position at any time without affecting in any way the electric circuit and consequently the alarm. A device or element 57 in the form of a screw is ar anged within the keeper 18. This screw is in the path of the bolt and has its head 58 adapted to engage the outer end of the device 42 when the bolt is moved to a locked position, the said screw being adapted to be adjusted so that the relative distance between the head of the screw and the outer end of the device 42 may be changed at will. lWhen the bolt is moved to a locked position as already described, the

. head will engage the outer end of the device 42 and move the same along the bolt, as shown in Figs. 1 to 3, and against the tension ot the spring` 46. lli a tool is inserted between the keeper and the casing for the purpose oft spreading the door from the jamb or otherwise tampering with the lock so that the spring can torce the device 42 outward because of such separation or tampering, the

. Contact finger 49 will thus be brought into contact with the end of the contact' 50l and thus close the circuit and sound the alarm. @it course,I if the bolt is moved by the usual means as the key, the contact in this case will not be made to close the circuit as the screw will hold the device 42 out of contact until the bolt moves far enough to cause the device 42 to move therewith.

From the foregoing, it will be seen that simple and efficient means is provided whereby an alarm may be given in case the lock is tampered with; that said mechanism may be easily and cheaply applied to various forms of locks as ordinarily constructed with very little additional expense; that said mechanism is effective and not likely to get out of order and is so inclosed that it cannot be readily tampered with when in use, and that the lock with said mechanism may be readily taken apart for repairs or adjustment when removed from the door.

Having thus described my invention, I claim as new and desire to secure by Letters Patent l. In a lock, the. combination of a casing, a bolt movable in said casing, a keeper, an adjustable member held in said keeper and arranged in the path of the bolt, a device bodily movable with the bolt and also movable lengthwise of the bolt and adapted to engage the member in the keeper to force said device lengthwise of the bolt, a contact adapted to engage a part of the device, in the absence of the member in the keeper, an electric alarm circuit including the casing, the device and the contact, and means for moving the bolt.

2. In a lock, the combination of a casing, a bolt movable in said casing, a keeper, a screw held in said keeper and arranged in the path of the bolt, a contact device carried by and bodily movable with the bolt and also movable lengthwise of the bolt and adapted to engage the screw in the keeper to force said contact device lengthwise of the bolt, a contact adapted to engage a part of the device, in the absence of the member in the keeper, an electric alarm circuit, including the casing, the contact device and the contact, and means for moving the bolt.

3. In a lock, the combination of a casing, a bolt having an engaging part provided with an opening therethrough, a keeper, a screw adjustably held in said keeper, means for moving the bolt, an alarm, an electric circuit including the alarm, a thin wire contact included in said circuit, a contact device having a body portion movable in the o-pening in the engaging part of the bolt and provided with an extended part having a finger adapted to engage the wire contact, said contact device being adapted to move with the bolt and to be engaged by the screw to move the Contact device relative to the bolt in one direction, and a spring tending normally to force the device in the opposite direction to close the circuit.

4f. In a lock, the combination of a casing,

a bolt having an engaging part provided with an opening therethrough, a keeper, a screw adjustably held in said keeper, means for moving the bolt, an alarm, an electric circuit including the alarm, a contact included in said circuit, a contact device having a body portion movable in the opening in the engaging part of the bolt and provided with means adapted to engage the first-mentioned contact, said contact device being adapted to move with the bolt and to be engaged by the screw to move the contact device relative to the bolt in one direction, and means for foro ing the device in the opposite direction to close the circuit.

5. In a lock, the combination of a casing, a bolt having an engaging part, a member arranged in the path of the bolt, means for moving Vthe bolt, a signal circuit, a thin wire contact in said circuit, a contact device also included in the circuit and slidingly held on the bolt and provided with an extended part having a iinger adapted to engage the wire contact, said contact device being adapted to move with the bolt and to be engaged by the member to move the contact device relative to the bolt in one direction, and a spring tending normally to force the device in the opposite direction.

6. In a lock, the combination of a casing, a bolt having an engaging part provided with an opening therethrough, means for moving the bolt, an alarm, an electric circuit including the alarm, a contact included in said circuit, a contact device having a body portion movable in the opening in the engaging part of the bolt and provided with an extended part having a finger adapted to engage the wire contact, said contact device being adapted to move with the bolt and to be engaged by the screw to move the contact device relative to the bolt in one direction, and a spring tending normally to force the device in the opposite direct-ion to close the circuit.

7. In a lock, the combination of a casing, a bolt having an engaging part provided with an opening therethrough, a keeper, a screw adjustably held in said keeper, means for moving the bolt, an alarm, an electric circuit including the alarm, a thin wire contact included in said circuit, and means arranged in the opening in the engaging part and adapted to engage the screw and to be forced thereby into engagement with the vvire contact to complete the circuit.

This specification signed and witnessed this 8th day of May A. D. 1913.

MORRIS SI-IEINMAN.

Witnesses:

LESTER C. TAYLOR, C. BARTELS.

Copies of this patent may 'De obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

